Fig. 13From: Post-treatment MRI aspects of photodynamic therapy for prostate cancerResidual fluid cavity. Six-month post-treatment follow-up MRI in a patient with left photodynamic therapy. Axial T2-weighted (a) and T1-weighted (b) MR images show an irregularly shaped residual fluid cavity in the treated lobe, with a low signal on T1 (arrowhead) and a high signal on T2Back to article page